AU6509299A - Process and apparatus for making glass beads - Google Patents

Process and apparatus for making glass beads

Info

Publication number
AU6509299A
AU6509299A AU65092/99A AU6509299A AU6509299A AU 6509299 A AU6509299 A AU 6509299A AU 65092/99 A AU65092/99 A AU 65092/99A AU 6509299 A AU6509299 A AU 6509299A AU 6509299 A AU6509299 A AU 6509299A
Authority
AU
Australia
Prior art keywords
beads
heated region
relaxation time
length
stream
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
AU65092/99A
Inventor
Rudolf K. Braun
Raymond Jackson
John W Lau
Reinhard H. Di Witt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PQ Holding Inc
Original Assignee
PQ Holding Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PQ Holding Inc filed Critical PQ Holding Inc
Publication of AU6509299A publication Critical patent/AU6509299A/en
Abandoned legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/10—Forming beads
    • C03B19/1005—Forming solid beads
    • C03B19/1015—Forming solid beads by using centrifugal force or by pouring molten glass onto a rotating cutting body, e.g. shredding
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/10—Forming beads
    • C03B19/1005—Forming solid beads
    • C03B19/102—Forming solid beads by blowing a gas onto a stream of molten glass or onto particulate materials, e.g. pulverising
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B19/00—Other methods of shaping glass
    • C03B19/10—Forming beads
    • C03B19/109—Glass-melting furnaces specially adapted for making beads
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C12/00—Powdered glass; Bead compositions
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
    • C03C3/078—Glass compositions containing silica with 40% to 90% silica, by weight containing an oxide of a divalent metal, e.g. an oxide of zinc

Abstract

A method and apparatus for preparing glass beads utilizes an equation solving for the relaxation time of molten glass filaments, which is the elapsed time from when a molten stream breaks up as a result of force imparted on the stream until reaching the relaxation point, at which a maximum percentage of filaments have formed round beads. The equation for relaxation time is tau =(d• mu )/ sigma , wherein tau is the relaxation time; d is the diameter of the formed round beads; mu is the viscosity of the filaments during the relaxation time; and sigma is the surface tension of the filaments during the relaxation time. The system for preparing glass beads is configured based on this equation by selecting certain parameters such that the relaxation point is achieved just when the round beads are exiting a heated region of the system and entering a cooling region, for example, the atmosphere. These parameters include the degree of heat applied both to melt the glass raw materials and to sustain the heated region, the length of the heated region, the force applied to the stream, and the composition of the molten glass. Typically, when designing a new system, all other parameters except for the length of the heated region are fixed, and the length is determined from the above equation. On the other hand, after a system is in place, the length of the heated region is usually fixed, and the force applied to the stream is determined based on the other parameters. In this way, a relatively high fraction of round beads are formed, even when relatively small beads are desired.
AU65092/99A 1998-10-06 1999-10-06 Process and apparatus for making glass beads Abandoned AU6509299A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16794298A 1998-10-06 1998-10-06
US09167942 1998-10-06
PCT/US1999/023241 WO2000020345A1 (en) 1998-10-06 1999-10-06 Process and apparatus for making glass beads

Publications (1)

Publication Number Publication Date
AU6509299A true AU6509299A (en) 2000-04-26

Family

ID=22609453

Family Applications (1)

Application Number Title Priority Date Filing Date
AU65092/99A Abandoned AU6509299A (en) 1998-10-06 1999-10-06 Process and apparatus for making glass beads

Country Status (8)

Country Link
EP (1) EP1135343B1 (en)
JP (1) JP2002526372A (en)
AT (1) ATE246153T1 (en)
AU (1) AU6509299A (en)
CA (1) CA2344245A1 (en)
DE (1) DE69910067T2 (en)
TW (1) TW491816B (en)
WO (1) WO2000020345A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10216894B4 (en) * 2002-04-17 2006-03-02 Siltrade Gmbh Glass for making glass beads and use
US7045475B2 (en) 2004-04-28 2006-05-16 Pq Corporation High refractive index glass beads for high retroreflectivity surfaces
US7449503B2 (en) 2004-10-18 2008-11-11 Potters Industries Inc. Glass microspheres with multiple bubble inclusions
DE102008025767B4 (en) 2008-04-03 2010-03-18 Bpi Beads Production International Gmbh Process for producing completely round small spheres of glass
US7846994B2 (en) 2008-12-23 2010-12-07 Potters Industries, Inc. Inorganic microspheres
CN101531457B (en) * 2009-04-17 2011-05-11 自贡市邓关玻璃纤维有限公司 Production formula for alkali-resistant glass marble, production method and production kiln thereof
EP3099639B1 (en) * 2014-01-27 2017-12-20 Ingenieurbüro Franke GlasTechnologie-Service Method and device for producing hollow glass spheres
DE102016117608A1 (en) * 2016-06-27 2017-12-28 Bpi Beads Production International Gmbh Method and device for producing hollow glass microspheres
CN106517803B (en) * 2016-10-31 2019-02-15 蚌埠玻璃工业设计研究院 A kind of production method and its device of high roundness glass microballoon
DE102017128734A1 (en) 2017-12-04 2019-06-06 Schott Ag A composite material comprising at least a first material and particles, the particles having a negative coefficient of thermal expansion α, and adhesive material comprising the composite material
DE102017128719A1 (en) 2017-12-04 2019-06-06 Schott Ag A lithium ion conductive composite material comprising at least a polymer and lithium ion conductive particles, and methods of producing a lithium ion conductor from the composite material

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877914A (en) * 1973-06-18 1975-04-15 Potters Industries Inc Method and apparatus for making glass spheres
US3907537A (en) * 1973-10-30 1975-09-23 Potters Industries Inc Apparatus for producing glass spheres
JPS60108328A (en) * 1983-11-15 1985-06-13 Ohara Inc Production of glass bead
US4643753A (en) * 1985-08-07 1987-02-17 Potters Industries, Inc. Method for making spherical particles
JPH01104336A (en) * 1987-10-15 1989-04-21 Asahi Fiber Glass Co Ltd Manufacture of spherical body

Also Published As

Publication number Publication date
EP1135343A1 (en) 2001-09-26
EP1135343B1 (en) 2003-07-30
DE69910067T2 (en) 2004-03-04
WO2000020345A1 (en) 2000-04-13
DE69910067D1 (en) 2003-09-04
CA2344245A1 (en) 2000-04-13
TW491816B (en) 2002-06-21
JP2002526372A (en) 2002-08-20
ATE246153T1 (en) 2003-08-15

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Legal Events

Date Code Title Description
MK6 Application lapsed section 142(2)(f)/reg. 8.3(3) - pct applic. not entering national phase